Graphophone sound-box.



No. slos. Patented :une 5, |900.

w. HART.

GRAPHUPHONE SOUND BOX.

(Application med Ju'ly 22, 1899.)

(Nu Model.)

IIIII ATE-NT Fries,

VILLIAM HART, OF KIRKSVILLE, MISSOURI.

GRAPHOPHONE SOUND-BOX.

SPECIFICATION forming part of Letters Patent No. 651,308, dated June 5, 1900. Application mea my 22, 1599. serial 110.724,823. (No moda.)

T0 @ZZ whom t may concorre;

Be it known that I, VILLIAM HART, a citi- 4zen of the United States, residing at vKirksville, in the county of Adair and State of Missouri, haveinvented a new and useful Graphophone-Reproducer, of which the following is aspecication.

This invention relates to graphophones, and more particularly to the reproducers thereof; and it has for one object to provide a styluscarrying arm which has such a connection with the diaphragm-supporting frame as will permit of universal movement of the stylus to enable it to be accurately seated upon the record, a further object of the invention being to provide a4 construction which in conforming with delicacy to the undulations of the record will intensify the volume and distinctness of the sound.

In the drawings forming a portion of this specification, and in which similar numerals of reference designate corresponding parts in the several views, Figure 1 is a longitudinal section of portions of a reproducer and of the stylus-arm, showing the location and arrangement of the latter, the stylus and adjacent portions being in elevation. Fig. 2 is a bottom plan View of the stylus-arm, showing its connection with the bracket through the medium of which it is attached to the frame. Fig. 3 is a side elevation showing the pivotal connection of the tubular frame-carrying arm.

Referring now to the drawings, 5 represents a sound-box, of usual construction, and in which is mounted a diaphragm 6, adapted to operate in connection with a stylus 7, which Atransmits vibrations thereto, to reproduce sounds recorded upon a recordy 8, having the usual mechanism for rotating. The stylus 7 is movably supported centrally of the diaphragm 6 through the medium of an larm 9. The outer end of the arm 9 is curved in the direction of the frame 5 and is tapered to a point, as shown at 10, toenter a recess or slot l1 in the frame 5, and which slot is disposed in radial alinernentwith the diaphragm. The slot 11 is curvilinear in cross-section, thus to permit the displacement of the end of the arm 9 therefrom under excessive lateral pressure, also to permit the ready seating of the end of the arm 9 in radial alinement with the diaphragm to bring the stylus 7 into axial aline ment with the diaphragm and ready for engagement with the record.

Fixed to or formed integral with the frame 5 are parallel ears 12 and 13, connecting which is a .pin 14, having a peripheral groove 15, preferably semicircular in cross-section, and in which lies the pin 16, which is fixed to the arm 9 adjacent toits outer tapered end. Thus if the pin 16 be held in engagement with the peripheral groove 15 the arm 9 may be moved, with the stylus 7, in the direction of the diaphragm 6 to lift the tapered end 10 from the groove 11, and when the tapered end is thus lifted the arm 9 may have a lateral swinging motion, and, furthermore, the inner end of the arm, and therewith the stylus, may be moved in a circular orbit.

In order'to hold the pin 16 in engagement with the groove 15, a spring-plate 18 is fixed to the arm 9 and has its outer end curved inwardly and then outwardly to form a shoulder 19, which lies against and exerts pressure upon a second pin 20, connected with the ears 12 and 13. The shoulder 19 is in slidable contact with the pin 20, and as the arm 9 is rocked from side to side the spring 1S, including the shoulder, has a yielding motion and tends to return the arm to the position shown in Fig. 2. Thus it will be seen that when the reproducer is out of engagement with the record the stylus may be accurately alined with the axis of the diaphragm and that it may be engaged while in this condition with the record, also that as soon as thestylus engages the record in its tendency to support the weight of the reproducer the stylus, together with the arm, will be moved in the direction of the diaphragm 6, the parts of the apparatus being so proportioned that when the stylus has engaged the diaphragm the tapered end 10 of the stylus-arm will be raised from the groove 11, and thus the stylus may have a movement longitudinally of the record in addition to and independent of'that movement,

contributed by the feed mechanism of the reproducer. Hence the stylus may. readily adapt itself to all variations in location of the impression upon the record longitudinally of the latter, and the result will be an accurate reproduction. Also the tendencyof the IOO spring 18 to move the end 10 of the stylus-l `reproducer, or that the ears may be formed f integral with the frame, and that the specific construction shown and described may be otherwise varied WithoutV departing from the spirit of the invention.

In Fig. 3 of the drawings there is shown the means for holding the sound-box yieldably in a position to maintain engagement of the stylus with the record to assist the action of gravity. In this figure of the drawings,25 represents the fixed cylindrical element of the usual pivotal connection, through which and the adjacent end of the sound-box-carrying arm there is passed a pivot screw or bolt 2. A spring-Wire 27 has a hook at one end, engaging a projection 28 upon the face of the fixed element, from which pin the Wire is looped around the adjacent end of the pivotbolt, and has a hook upon its opposite end engaging the pin 29 upon the box-carrying arm 30. A similar arrangement is provided at the opposite side of the connection, the tension of the spring being such as to tend to rotate the arm upon its pivot, and thus hold the diaphragm adjacent the record and maintain yieldable engagement of the stylus With the record.

While in the drawings there is shown a spring-Wire, it Will of course be understood that any other specific form and arrangement of spring for the purpose may be employed.

Having thus described the invention, Whatis claimed is l. In a graphophone-reproducer, the combination With a sound-box and a diaphragm, of ears carried by the frame, a groove intermediate the ears, a stylus-carrying arm adapted to enter said groove to aline with a radius of the diaphragm, a pin carried by the arm, a pin supported by the ears and having a peripheral groove adapted to receive the pin in the arm, and means for yieldably holding said pin in the groove.

2. In a graphophone-reproducer, the combination with a sound-box and a diaphragm, of ears carried by the frame, a groove intermediate the ears, astylus-carrying arm adapted to lie in said groove and to be held thereby in a predetermined position, a-pin carried by the ears and having a peripheral groove, a pin carried by the arm and adapted to rockingly engage said groove and to move therein peripherally of the pin in the ears, a second pin connected with the ears, and a spring carried by the arm and engaging the last-named pin to hold the pin and groove in mutual engagement.

3. In a graphophone, the combination with a record and a reproducer comprising a diaphragm, a sound-box including a sound-tube, and a stylus in operative relation to the diaphragm, of a support for the box having pivotal connection with the sound-tube thereof, a pin carried by the sound-tube, a pin carried by the support, and a spring engaging the said pins and having a loop lencircling the pivotal connection, said Wire being adapted to hold the box yieldably in the direction of the record.

4. In a graphophone, the combination with a sound-box having a diaphragm, of a styluscarrying arm having universal connection with the box and adapted to hold the stylus in engagement with the record, a projection upon the arm, and a groove in the box adapted to receive the projection and hold the arm against universal movement when the stylus is disengaged from the record.

5. The combination with a sound-box having a diaphragm, of a stylus-carrying arm having a universal connection with a soundbox, and means for holding the arm yieldably against universal movement when its stylus is disengaged from the record.

In testimony that I claim the foregoing as my own I have hereto aiiixed my signature in the presence of two Witnesses.

VILLIAM HART.

Witnesses:

JOHN M. Davis, N. ANsPAUcH. 

